Authkey is currently not sent for WMS GetLegendGraphic requests #10727

[rowheat02]

Description

Auth Token also sent if auth rule matches in SecureImage

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/geosolutions-it/MapStore2/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x", remove the others)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes

Issue

#10727

What is the current behavior?
#10727

What is the new behavior?
Auth token is sent to the securedImage URL as params if rule exists in localConfig so legend images are rendered without error.

Breaking change

Does this PR introduce a breaking change? (check one with "x", remove the other)

• Yes, and I documented them in migration notes
• No

Other useful information

[tdipisa]

@rowheat02 please update this PR by aligning it to master branch.

[MV88]

@ElenaGallo testable in DEV